Class 9 · Chemistry · Medium level · 8 questions
Structure of Atoms: Medium 1
What everything is made of, and why the electrons on the outside decide how a substance behaves. In Class 9 Chemistry the topic covers the three parts and atomic number and mass number. This quiz is a step up: the questions ask you to use the ideas as well as recognise them. 8 questions (multiple choice), marked the moment you finish, with the reason for every answer.
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